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最終更新日：2024/11/29
小島 千尋
コジマ チヒロ
(Chihiro Kojima)
論文
- タイトル
- タイトル（英）
- Muscle oxygenation, endocrine and metabolic regulation during low-intensity endurance exercise with blood flow restriction.
- 参照URL
- https://researchmap.jp/c-kojima1027/published_papers/31674417
- 著者
- 著者（英）
- Hyejung Hwang,Sahiro Mizuno,Nobukazu Kasai,Chihiro Kojima,Daichi Sumi,Nanako Hayashi,Kazushige Goto
- 担当区分
- 概要
- 概要（英）
- PURPOSE: The present study investigated the effect of endurance exercise with blood flow restriction (BFR) performed at either 25% maximal oxygen uptake (V˙O2 max) or 40% V˙O2 max) on muscle oxygenation, energy metabolism, and endocrine responses. METHODS: Ten males were recruited in the present study. The subjects performed three trials: (1) endurance exercise at 40% V˙O2 max without BFR (NBFR40), (2) endurance exercise at 25% V˙O2 max with BFR (BFR25), and (3) endurance exercise at 40% V˙O2 max with BFR (BFR40). The exercises were performed for 15 min during which the pedaling frequency was set at 70 rpm. In BFR25 and BFR40, 2 min of pressure phase (equivalent to 160 mmHg) followed by 1 min of release phase were repeated five times (5 × 3 min) throughout 15 minutes of exercise. During exercise, muscle oxygenation and concentration of respiratory gases were measured. The blood samples were collected before exercise, immediately after 15 min of exercise, and at 15, 30, and 60 minutes after completion of exercise. RESULTS: Deoxygenated hemoglobin (deoxy-Hb) level during exercise was significantly higher with BFR25 and BFR40 than that with NBFR40. BFR40 showed significantly higher total-hemoglobin (total-Hb) than NBFR40 during 2 min of pressure phase. Moreover, exercise-induced lactate elevation and pH reduction were significantly augmented in BFR40, with concomitant increase in serum cortisol concentration after exercise. Carbohydrate (CHO) oxidation was significantly higher with BFR40 than that with NBFR40 and BFR25, whereas fat oxidation was lower with BFR40. CONCLUSION: Deoxy-Hb and total Hb levels were significantly increased during 15 min of pedaling exercise in BFR25 and BFR40, indicating augmented local hypoxia and blood volume (blood perfusion) in the muscle. Moreover, low-and moderate-intensity exercise with BFR facilitated CHO oxidation.
- 出版者・発行元
- 出版者・発行元（英）
- 誌名
- 誌名（英）
- Physical Activity and Nutrition
- 巻
- 24
- 号
- 2
- 開始ページ
- 30
- 終了ページ
- 37
- 出版年月
- 2020年6月
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- 研究論文（学術雑誌）
- ISSN
- DOI URL
- https://doi.org/10.20463/pan.2020.0012
- 共同研究・競争的資金等の研究課題